Sash-lock.



PATENT OFFICE.

DANIEL G. SAUNDERS, JR., OF KANSAS CITY, MISSOURI.

SASI-LLOCK.

Specification of Letters Patent.

Patented Sept. 17, 1907.

Application filed October 18, 1906- Serial No. 339,511.

To all whom it may concern:

Be it known that I, DANIEL G. SAUNDERS, .Ir., a citizen of the UnitedStates, residing at Kansas City, in the county of Jackson and State ofMissouri, have invented certain new and useful Improvements inSash-Locks, of which the following is a specification.

My invention is an improved form of sash lock. Its objects are to supplya device which shall embody all the features of perfect automaticaction, unusual strength to resist forcible loosening or displacement,security against any tampering with or unfastening from without,automatic adjustment adapting it to meet and remedy any defect inalinement of the sash rails caused by shrinkage, imperfect workmanship,settling of the building, wear from use, or any cause whatever; also anylack of care in pushing the sash fully down, or in removing any slightobstruction which might not be observed, but would prevent the sashgoing fully down against the window sill.

A further object of my invention is to embody these many desirablefeatures in a device of small size, neat appearance, simple andinexpensive construction, and the maximum of efficiency in use.

I accomplish these several objects by means of the mechanism illustratedin the drawings which accompany and form part of this application, andin which Figure 1, is a vertical sectional view taken through the centerof the device, as seen applied to the two window sashes. Fig. 2, is asomewhat enlarged view of the same without showing the sashes. Fig. 3,is an elevation of the catch, or part of the device attached to theupper sash, as seen from either edge. Fig. 4, is an elevation ofthecatch as seen from the front, or inner side of the window. Fig. 5, is aplan view of the catch as seen from the top. Fig. 6, is a plan view ofthe lock proper, the part of the device attached to the lower sash. Fig.7, is a plan View of the same as seen from its under side, and showingthe bolt in position. Fig. 8, is an elevation of the rear side of thelock proper, showing the end of the locking bolt.

In the drawings like reference letters and numerals indicate like partsand details of construction throughout the several views, the principalparts of the device being designated by letters while details ofconstruction are pointed out by numerals.

Describing the different parts of the invention, and their functions, Ais the lock proper, the part attached to the lower sash, being securedin place by screws which pass downward through the openings, 3, 3, in avertical position.

O, is the catch, the portion of the device attached to the upper sash,also by screws, but it will be seen that while the screw in the opening,19, is in a vertical position, the one in the opening, 20, is in ahorizontal position, 'or at right angles to its companion screw. Thenovel form of the catch which permits this manner of attaching it to thesash rail, is deemed an important feature of the invention as givinggreat security and strength with minimum weight of material used. Toforce the catch loose if thus fastened, implies breaking away aconsiderable portion of the sash rail, while if fastened with the screwsin vertical position only, as has been the method in many previous formsof sash locks, it would be held in place only by the wood forming thethreads about the screws, and might with light force applied to bottomrail of the lower sash, be pried loose and displaced, allowing the lowersash to be raised, or .the window opened. Attached in the way I havedevised, it is seen that to loosen the-catch would require a forcesufficient to crush the sash rail, or break the screw square off,neither of which could be done by ordinary means.

It will be noted that the two parts, A and O, are each formed from asingle piece of sheet metal, without riveting or welding, a form whichmay be given them entirely by die stamping, a fact which materiallyreduces the cost of production, another important feature of theinvention.

The piece, A, has the central box like portion, 1 the fiat projectingends, 2 the screw openings, 3,- the tightening lug housings, 4- theoblong opening, 5, in which the inner end of the locking bolt moves andalso another opening through which the projecting end of the boltpasses. At the central portion of its rear wall the box portion of thepiece A, has an outward projecting lug, or ward, 4, which overlaps asimilar ward, 18, at lower end of the opening, 17, in the catch G, whenthe parts are in position of locking. By this means I provide a secureguard against the insertion of a knife blade, or other instrument foropening the look from outside. The tightening lug housings, 4, projectrearward and laterally from the inner corners of the box portion, 1,being somewhat in the shape of a hollow half cone, with one of its edgesattached at corner of the box, 1, and the other edge sloping to embracethe lugs, 16, of the part, 0, and as sash is pushed down to place, theselugs, 16, entering their housings, 4, draw the two parts, A, and tightlytogether, bringing the sash rails in contact to form an air and dustproof joint, and prevent rattling, or the ingress of wind or cold.

The bolt, B, has at its outer projecting end a knob, 6, or may have anyother convenient form for taking hold of. As shown in the drawings, ithas a round portion, 7, and at its inner end a portion oblong in crosssection, though it is obvious that those details might be varied withoutdeparting from the scope of the invention. At its inner end it has thesteps, or notches, 10, and 12, with the normal locking space, 11,between them. The horizontal base of the notch or step, 10, forms thesafety lock allowing the reduced height of the bolt to enter theopening, 17, in the catch when the lower sash is not pushed fully down,and the horizontal space, 11, between the two steps, 10, and 12, formsthe normal locking space when sash is pushed fully down to the sill. Thevertical wall of the notch, 12, forms the stop lock, for holding thebolt in unlocked position when that may be desirable, as it will be seenthat a slight depression of the extreme outer end of the bolt will carryits inner end upward bringing this step inside the box, where thepressure of the coil spring, 9, will securely hold it. This coil spring,9, is the actuating power in the automatic operation of the lockingprocess. It encircles the body of the bolt and is compressed by contactwith a cross pin, or shoulder, or any suitable means.

The catch, 0, attached to upper sash, is formed with a horizontalportion, 13, having in it the screw opening, 19, an inverted U shapedupper portion, in which is the oblong opening, 17, in which the innerend of the bolt enters, and a nearly vertical portion, 15 provided withthe opening, 20, through which the horizontal screw passes to secure itto the sash rail. At lower end of the opening, 17, is the piojectinglug, 18, to serve as a ward against picking the lock from outside, ashas already been explained. The tightening lugs, 16, (see Figs. 3, 4,and 5), project rearward and laterally from the edges or the piece, (7,being preferably formed from the same sheet of metal. As seen, thesetaper upward, and as herein before explained, enter the housings, 4, ofthe part, A, and by their wedge shape draw the two parts tightlytogether, as before noted. The vertical portion of the part, C, has thedual function of supplying a stronger method of attaching the catch tothe sash rail, as well as forming a guide, or stop lug, by means ofwhich the workman may always place the catch in proper position. This isimportant, as from the form of the meeting rails in some sashes, aslight variation from its correct position would detract from itslocking efiiciency, or interfere with its free automatic action.

I do not, in these drawings and specifications, confine myself to thespecific construction of any of the parts of the device, as it isapparent that the principle of automatic action in securing similar orequivalent results might be utilized by substantially the same means,though differing in details. What I show, and have described, is thepreferable method of producing a sash lock that meets all therequirements of simplicity of construction and use, perfect security,low cost, small size, and neat appearance, the objects of my invention,as recited at the beginning of this specification.

Having thus described the different parts of my in vention, the detailsof their construction, their positions and relation to each other, andpointed out their several function in attaining its objects, what Iclaim as new, and desire to secure by Letters Patent of the UnitedStates is z- 1. In an automatic sash lock, a bolt housing containing -aspring actuated bolt, the forward end of said bolt being in the form ofsteps, or notches, adapting it to enter the recess of the locking platein two or more positions, substantially as shown and described.

2. An automatically actuated sash lock, composed essentially of threeprincipal parts, the bolt housing, A- the bolt, Band the catch, Csaidpart A being formed to embody the central box, 1the projecting ears,2the lug housings, 4the ward 4"and bolt openings. 5. The spring actuatedlocking bolt, B, having at its inner end two or more notches, or steps;and the catch, C, formed with a horizontal portion, 13a curved upperportion, 14, and a vertical portion, 15; and also the locking boltrecess, 17 the tightening lugs, 16, projecting from its edges, and thevertical portion, 15, with screw opening, 29, all formed, arranged, andcoiiperating, substantially in the manner, and for the purposes as shownand described.

In testimony whereof I afiix my signature, in the presence of twowitnesses.

DANIEL G. SAUNDERS, .TR.

Witnesses Ki 'rrmluxn McNAnB, .T. LEE KNIGHT.

